These entries are queried from radb.net using whois, you can try my project getting these.
:AS131937 route: 103.118.92.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.118.92.0/23 descr: Joetsu Cable Vision IPv4 CIDR-block NO.1-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.118.94.0/23 descr: Joetsu Cable Vision IPv4 CIDR-block NO.1-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.152.66.0/23 descr: Joetsu Cable Vision IPv4 CIDR-block JMiX NO.1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.152.66.0/24 descr: Joetsu Cable Vision IPv4 CIDR-block JMiX NO.1-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 103.152.67.0/24 descr: Joetsu Cable Vision IPv4 CIDR-block JMiX NO.1-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.0.0/19 descr: Joetsu Cable Vision IPv4 CIDR-block NO.5 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.0.0/20 descr: Joetsu Cable Vision IPv4 CIDR-block NO.5-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.16.0/20 descr: Joetsu Cable Vision IPv4 CIDR-block NO.5-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.32.0/21 descr: Joetsu Cable Vision IPv4 CIDR-block NO.6 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.32.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.6-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 126.251.36.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.6-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.64.0/21 descr: Joetsu Cable Vision IPv4 CIDR-block NO.3 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.64.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.3-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.68.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.3-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.96.0/19 descr: Joetsu Cable Vision IPv4 CIDR-block NO.4 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.96.0/20 descr: Joetsu Cable Vision IPv4 CIDR-block NO.4-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 170.249.112.0/20 descr: Joetsu Cable Vision IPv4 CIDR-block NO.4-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.223.12.0/22 descr: Joetsu Cable Vision IPv4 CIDR-block NO.2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.223.12.0/23 descr: Joetsu Cable Vision IPv4 CIDR-block NO.2-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.223.14.0/23 descr: Joetsu Cable Vision IPv4 CIDR-block NO.2-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2403:4040::/32 descr: Joetsu Cable Vision IPv6 Address-block NO.1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2403:4040::/48 descr: Joetsu Cable Vision IPv6 Address-block NO.1-1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2403:4040:1::/48 descr: Joetsu Cable Vision IPv6 Address-block NO.1-2 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2403:4040:2::/48 descr: Joetsu Cable Vision IPv6 Address-block NO.1-3 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2406:2b40::/32 descr: Joetsu Cable Vision IPv6 Address-block JMiX NO.1 X-Keiro : jcv-ix-isp [at] jcv.co.jp origin: AS131937 notify: jcv-ix-isp [at] jcv.co.jp mnt-by: MAINT-AS131937 changed: junkanai [at] jcv.co.jp 20231228 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source